Image brightness is “gamma-corrected”, further increasing image contrast by making the color shades of the nuclei more saturated; moreover, the Mean Shift algorithm is applied to make the coloring of the cell nuclei more homogeneous, as shown inFigure 6. ...
Food fortification in low-income settings is limited due to the lack of simple quality control sensing tools. In this study, we field validated a paper-based, smartphone-assisted colorimetric assay (Nu3Px) for the determination of iron in fortified flour